Home / 30,719.16-42,410.52-28,947.72

Finding the Fourth Proportional to 30,719.16, 42,410.52 and 28,947.72

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Solution

The fourth proportional to 30,719.16, 42,410.52 and 28,947.72 is: 39,964.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,719.16 : 42,410.52 = 28,947.72 : x
  2. Step 2: Convert to fraction form
    30,719.16/42,410.52 = 28,947.72/x
  3. Step 3: Cross multiply
    30,719.16x = 42,410.52 × 28,947.72
  4. Step 4: Simplify right side
    30,719.16x = 1,227,687,858.01
  5. Step 5: Solve for x
    x = 1,227,687,858.01/30,719.16
  6. Step 6: Final answer
    x = 39,964.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.